The LG Envy requires the user to enter a "lock code" to perform certain functions on the phone. For example, to perform a factory reset, the user must enter the four-digit lock code twice during the ...

Setting a lock code on an app-by-app basis is a great way to add another level of security to your device. With App Lock, it's as easy as setting a PIN. Jason Cipriani is based out of beautiful ...

A code that prevents a wireless phone from unauthorized use. When explicitly locked, and each time the phone is turned on, it will prompt the user to enter the code before it will allow a call to be ...

This simple code lock circuit described here is of an electronic combination lock for daily use. It responds only to the roght sequence of four digits that are keyed in remotely. If a wrong key is ...